I'm a Delawarean, and I have done research and reporting about the state's unique role in corporate America.

You may wonder why two-thirds of the Fortune 500 are incorporated in Delaware. Is it because the cost of incorporation is lower than in other states, or because corporate tax rates are lower? Those are factors, but they are not the primary reason. The primary reason is risk avoidance, and in particular legal risk avoidance.

Delaware benefits from a flywheel effect: Because so many companies are incorporated in the state, its Chancery Court has a more developed set of case law than other states, and so outcomes of lawsuits involving corporations are more predictable -- which makes it an even more attractive place to incorporate, which continues the flywheel effect.

The down side is that the state is incredibly dependent on corporate licensing fees and escheatment. States like Nevada have, in recent years, been competing against Delaware as a corporate haven, and if we start to see a significant migration, we'll be in a real pickle, because the state imposes no sales tax and has relatively low property taxes.